Acres to Hectares Converter
Convert acres to hectares instantly. Exact factor: 1 acres = 0.40469 ha.
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Convert acres to hectares
The exact conversion factor is 1 acres = 0.40469 ha. Type any value and the result updates instantly; the math is shown beneath the board.
Worked by hand
Multiply the acres value by 2.471 (that is, 1 ÷ 0.40469) to get hectares.
Worked example
- Take 1 acres
- multiply by 2.471
- the result is 0.40469 ha
How to use it
- Enter your acres
- Read the hectares result
- Check the factor line to verify by hand
Frequently asked questions
How many hectares are in one acres?
Exactly 0.40469 ha, by the SI/NIST definition.
How do I convert hectares back to acres?
Divide by 0.40469 — or use the full converter where both directions are one click.
Is this rounding or exact?
The factor is exact; only the displayed decimals are rounded.